2. She can't be old enough.
3. He can't be very intelligent.
4. She must be hungry.
5. She can't be an Italian (Если мы говорим о той женщине, что слева))) (Или She must be an Italian - если о той, что справа)
I haven't eaten for six hours. - You must be hungry.
I have lost the CDs I bought yesterday. - You must be sad.
Linda told me she's broken my MP3 player. - You must be angry.
I'd like another burger. - You've already eaten five. You can't be hungry.
Can you give me another sweater, please? - You've already got three. You can't be cold.